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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A258781 a(n) is the greatest positive integer k such that lambda(k) <= n where lambda is the Carmichael lambda function (A002322).

Table of values

n a(n)
1 2
2 24
3 24
4 240
5 240
6 504
7 504
8 504
9 504
10 504
11 504
12 65520
13 65520
14 65520
15 65520
16 65520
17 65520
18 65520
19 65520
20 65520
21 65520
22 65520
23 65520
24 131040
25 131040
26 131040
27 131040
28 131040
29 131040
30 171864
31 171864
32 171864
33 171864
34 171864
35 171864
36 138181680
37 138181680
38 138181680

List of values

[2, 24, 24, 240, 240, 504, 504, 504, 504, 504, 504, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 65520, 131040, 131040, 131040, 131040, 131040, 131040, 171864, 171864, 171864, 171864, 171864, 171864, 138181680, 138181680, 138181680]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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